#define _CRT_SECURE_NO_WARNINGS
#include"date.h"


void Date::Dateprint()
{
	cout << _year <<"-" << _month << "-" << _day << endl;
}

int Date::GetMonthDay(int year, int month)
{
	int arr[13] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 };
	if (month == 2 && (year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
	{
		return arr[2];
	}
	else
	{
		return arr[month];
	}
}

Date::Date(const Date& d)
{
	_year = d._year;
	_month = d._month;
	_day = d._day;
}

Date& Date::operator=(const Date& d)
{
	_year = d._year;
	_month = d._month;
	_day = d._day;
	return *this;
}

bool Date::operator>(Date& d)
{
	if (_year > d._year)
	{
		return true;
	}
	else if (_year == d._year && _month > d._month)
	{
		return true;
	}
	else if (_year == d._year && _month == d._month && _day > d._day)
	{
		return true;
	}
	else
	{
		return false;
	}
}

bool Date::operator==(Date& d)
{
	return _year == d._year && _month == d._month && _day == d._day;
}

bool Date::operator>=(Date& d)
{
	return(*this == d || *this > d);
}

bool Date::operator<(Date& d)
{
	return!(*this >= d);
}

bool Date::operator<=(Date& d)
{
	return!(*this > d);
}

bool Date::operator!=(Date& d)
{
	return !(*this == d);
}

Date& Date::operator+=(int day)
{
	_day += day;
	while (_day > this->GetMonthDay(_year, _month))
	{
		_day -= this->GetMonthDay(_year, _month);
		_month++;
		if (_month == 13)
		{
			_year++;
			_month = 1;
		}
	}
	return *this;
}

Date Date::operator+(int day)
{
	Date tmp(*this);
	tmp += day;
	return tmp;
}

Date& Date::operator-=(int day)
{
	_day -= day;
	while (_day <= 0)
	{
		_day += this->GetMonthDay(_year, _month);
		_month--;
		if (_month == 0)
		{
			_year--;
			_month = 12;
		}
	}
	return *this;
}

Date Date::operator-(int day)
{
	Date tmp(*this);
	tmp -= day;
	return tmp;
}

Date& Date::operator++()
{
	*this += 1;
	return *this;
}

Date Date::operator++(int)
{
	Date tmp(*this);
	*this += 1;
	return tmp;
}